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Old 3rd March 2010, 10:38 AM   #1
zog666 is offline zog666  Australia
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Default noise level on 41hz ta2022 kits when using compression drivers?

Hi,

I'm looking at the AMP5 / AMP10 / AMP10-Basic kits from 41HZ - but I want to use them with fairly high efficiency compression drivers (econowave type speakers). Are these amps when assembled with good shielding capable of being close to "dead quiet"? I've heard some of the Tripath amp modules can have a little bit of background noise when used with high efficiency speakers - obviously no amp can be completely quiet but with the Class AB amp I'm currently using I have to pretty much stick my ear right in the horn to hear the background hiss, and its inaudible away from the speaker.
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Old 3rd March 2010, 01:04 PM   #2
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I've never heard a Tripath amp that was "dead quiet" or even close.

I've had amps based on nearly all the different Tripath chips at one time or another. None of them have ever come close to some other Class-D amps I've owned in terms of background noise (or lack there of).

The quietest Class-D amps I've owned were IcePower's 200ASC and IR's IRAUDAMP1 reference board.

I have a few AMP1-B's which are similar to AMP5 and AMP10. I can tell you they do have a noticeable amount of background noise. The 5V analog supply plays a major role in this noise though.
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Old 3rd March 2010, 01:20 PM   #3
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The SMD TP2050-chipset amps are AFAIK the quietest Tripaths. This would include 41Hz Amp4 / Amp11. (According to some posts by V-Bro at the 41Hz forums, at least. Perhaps we can get him to do some noise measurements?)
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Old 4th March 2010, 11:51 AM   #4
zog666 is offline zog666  Australia
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Aha, thanks for the info. This doesn't completely discount them for me but another point of info while I do my "homework" on this.
Would the TA3020 based AMP15 be quieter? (I'm not even game to go anywhere near the TRUPATH kit).
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Old 4th March 2010, 12:00 PM   #5
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The TP2050 is reported to be quieter. It's a smaller chip, and there's less metal overall to pick up noise, so it makes sense to my uninfirmed self.

Re. Truepath: Heh (Though I don't think the Truepath isn't as complex as it seems ... I do plan on trying one, mostly to play with a lowish-voltage bridged TA3020 ...)
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Old 8th March 2010, 09:46 AM   #6
zog666 is offline zog666  Australia
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Quote:
Originally Posted by kristleifur View Post
Re. Truepath: Heh (Though I don't think the Truepath isn't as complex as it seems ... I do plan on trying one, mostly to play with a lowish-voltage bridged TA3020 ...)
Just listened to a Connex Electronics TA3020 board (well implemented with shielded wiring and ground loop protection etc) in comparison with some other amps and it has the level of silence and sound I am after.

The TRUEPATH also looks great but I have heard it is pretty hairy to build.. maybe one day, when I have attained level 13 zen solder ninja status.
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